Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity - Class B Common Stock (Detail)

v3.3.1.900
Stockholders' Equity - Class B Common Stock (Detail) - Class B Common Stock - shares
1 Months Ended 12 Months Ended
Nov. 30, 2015
Aug. 31, 2015
Jun. 30, 2015
May. 31, 2015
Mar. 31, 2015
Feb. 28, 2015
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Class Of Stock [Line Items]                  
Stock issued upon vesting of deferred equity units, transaction date           Feb. 28, 2015      
Common stock issuance date     Jun. 30, 2015            
Common stock conversion date Nov. 30, 2015 Aug. 31, 2015              
Balance, Shares             4,520,413 4,465,000  
Class B common stock issued upon vesting of deferred equity units           126,616      
Cancellation of Class B common stock upon conversion of Class B units to Class A common stock             211,000 246,000 2,013,000
Balance, Shares             4,695,014 4,520,413 4,465,000
Resale And Registration Rights Agreement                  
Class Of Stock [Line Items]                  
Cancellation of Class B common stock upon conversion of Class B units to Class A common stock (77,116) (65,477)   (50,000) (18,000)        
Jamison                  
Class Of Stock [Line Items]                  
Class B common stock issued upon vesting of deferred equity units     258,578